This is the whole problem i have with Sasuke's getting his powers. He's clearly as emo as ever, constantly flip flopping on what he wants. There's nothing more dangerous than someone with powers/skills that you just can't read. I mean are people seriously surprised about this?
I wouldn't necessarily call him "evil", but he's too unpredictable and too emo and angsty to be worthy of being the leader of anything. He's a rabid dog who should've been shot down a long ****ing time ago, but of course, Naruto's too much of a wimp to even think that some people just need to be killed. It's clear Tobirama was right on all of this.
But, alas, Sasuke's still Sasuke, and Naruto will probably TnJ him in the end. I'm praying he flat out kills him, but it's possible the sealing tools could come into play here...